Rocket of Whispers: Prologue
Released Sep 2018
In a chilling cellar below the apocalyptic snow, Fei Lin the witch wakes up from hibernation, and ventures into the forsaken world. Guide her through the process of escaping the cellar, and seeing the changed world for her first time.
77% positive · 285 reviews
Done
All announced content has been released
High confidence
Done
All announced content has been released
High confidence
Where to get it
Free on Steam
Evaluation
Rocket of Whispers: Prologue is a free, short narrative game explicitly described as a "mini companion piece" to OPUS: Rocket of Whispers. It was released on September 12, 2018, alongside its original soundtrack. The store description makes clear this is a self-contained prequel experience — a deliberately short, standalone prologue with no post-launch content planned or announced. SIGONO's developer news posts from 2021 and 2023 are announcements for entirely separate games in the OPUS series (Echo of Starsong and Prism Peak), not updates or additions to this prologue. There is only one DLC listed (the soundtrack), which released on the same day as the game. The game launched as a complete, finished product.
Evidence
Store description explicitly describes this as a 'free mini companion piece' for OPUS: Rocket of Whispers, with a very short playtime — indicating it was designed and shipped as a complete, standalone experience.
The only DLC is the original soundtrack, released on launch day. No additional DLC has been listed or announced.
Content
1 of 1 released · no outstanding content
Media
Details
Developer
Publisher
SIGONO INC.
Achievements
—
Platform
Windows, macOS
Controller
—
Steam Deck
Not rated
Players
Single-player
About this game
Rocket of Whispers: Prologue is a short narrative game with a very short playtime.
It takes place before the main game, OPUS: Rocket of Whispers, and tells the story of Fei Lin’s first waking moments.
“Fei... Have you awakened?”
When I awoke, I was all alone.
The familiar scenery around me, were in ruins.
In a chilling cellar below the apocalyptic snow, Fei Lin the witch wakes up from hibernation, and ventures into the forsaken world. Guide her through the process of escaping the cellar, and seeing the changed world for her first time.
“If you awaken to a world in ruin, please... return us...” - Church Elder
With an important mission and the hopes of the people resting on her shoulders, Fei Lin takes her first steps into a lonely, empty world that has been forgotten by time itself.
==========================================
※ This is a free mini companion piece for OPUS: Rocket of Whispers, created for our fans.
It takes place before the main game, OPUS: Rocket of Whispers, and tells the story of Fei Lin’s first waking moments.
Story
“Fei... Have you awakened?”
When I awoke, I was all alone.
The familiar scenery around me, were in ruins.
In a chilling cellar below the apocalyptic snow, Fei Lin the witch wakes up from hibernation, and ventures into the forsaken world. Guide her through the process of escaping the cellar, and seeing the changed world for her first time.
“If you awaken to a world in ruin, please... return us...” - Church Elder
With an important mission and the hopes of the people resting on her shoulders, Fei Lin takes her first steps into a lonely, empty world that has been forgotten by time itself.
Game Features
- Explore Fei Lin’s origin
- Escape the cellar!
- A hauntingly beautiful world
- An audiovisual marvel
==========================================
※ This is a free mini companion piece for OPUS: Rocket of Whispers, created for our fans.
Are these done yet?
Last evaluated Jun 26, 2026
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